Stop receiving push notifications for the given user mailbox
AI agents use stop_mail_watch to create or update resources in Gmail MCP — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Gmail MCP environment.
This tool modifies the push notification subscription/watch configuration for a mailbox, disabling real-time updates. It is a reversible configuration change (watch can be re-enabled), making it a Write operation. Misuse could cause an agent or user to miss important email notifications, but it does not delete data or move money.
From the tool's definition Stop receiving push notifications for the given user mailbox
Documented attack patterns abuse exactly the kind of access stop_mail_watch gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Gmail MCP, and nothing reaches the server without passing your rules. This is the rule we recommend for stop_mail_watch:
{
"version": "1",
"default": "deny",
"tools": {
"stop_mail_watch": {
"limits": [
{
"counter": "stop_mail_watch_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}stop_mail_watch stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.
Free to start. No card required.
Stop receiving push notifications for the given user mailbox. It is categorised as a Write tool in the Gmail MCP MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Gmail MCP server in PolicyLayer and add a rule for stop_mail_watch: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches Gmail MCP. Nothing to install.
stop_mail_watch is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.
Yes. Add a rate_limit block to the stop_mail_watch rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.
Set action: deny in the PolicyLayer policy for stop_mail_watch. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.
stop_mail_watch is provided by the Gmail MCP server (shinzo-labs/gmail-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 65 Gmail MCP tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
65 Gmail MCP tools catalogued and risk-classified — across an index of 42,500+ MCP servers.